CONDENSED TANNIN AS ANTI-DEFOLIATE AGENT AGAINST BROWSING BY GIRAFFE (GIRAFFA-CAMELOPARDALIS) IN THE KRUGER-NATIONAL-PARK

被引:67
作者
FURSTENBURG, D [1 ]
VANHOVEN, W [1 ]
机构
[1] UNIV PRETORIA,CTR WILDLIFE MANAGEMENT,PRETORIA 0002,SOUTH AFRICA
来源
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-PHYSIOLOGY | 1994年 / 107卷 / 02期
关键词
GIRAFFE; TANNIN; CHEMICAL DEFENSE; BROWSE; FEEDING ECOLOGY; HERBIVORE PLANT INTERACTION;
D O I
10.1016/0300-9629(94)90402-2
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The feeding behaviour of giraffes in the Kruger National Park, South Africa, was observed over 12 months and the diet analysed for condensed tannin content. Supportive evidence was found for plant defence against excessive browsing by means of tannin biosynthesis. Condensed tannin negatively influenced acceptability and nutritional value of dietary browse to giraffes. The giraffes avoided high condensed tannin levels. Tannin content of dietary foliage increased due to browse disturbance. Tannin levels fluctuated daily within the canopy of individual plants in relation to change in temperature, light intensity and phenological status of the foliage.
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页码:425 / 431
页数:7
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